Emil steeitz



l(No Model.)

' Y E. STREIT'Z.

GENTRIPUGAL BOLTING MAGHINP. No. 329,097. Patented 0011.27, 1885.

///////////M}IIH ry I WWA/5885s UNITED STATES PATENT @Finca EMILSTREITZ, OF FREIENWALDE, PRUSSIA, GERMANY.

CENTRIFUGAL BOLTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 329,097, dated October27,1885.

Application filed May 22, 1885. Serial No. 166,370. (No model.) Patentedin Belgium April 30, 1885, No. 63,709, andin England April zio, 1ss5,N0.5,345.

.T0 a/ZZ whom it may concern.-

Beitknown thatl, EMILSTREITZ, of Freien- Walde, in the Kingdom ofPrussia and Empire .of Germany, have invented certain new and usefulImprovements in Centrifugal Bolting- Machines, of which the following isa specification.

The object of this invention is to furnish an improved verticalcentrifugal bolting-machine in which the air-pressure is uniformlydistributed within the machine, and thereby a very effective action ofthe same obtained.

The invention consists of a bolting-reel formed of a wire frame or cage,having a bolting-cloth placed loosely thereon, and radial beatersattached to a hollow cylindrical shaft having open ends, air-openings,and a horizontal partition or diaphragm. The boltingreel is inclosed bya frame having interior screens and exterior doors,'the spaces betweensaid screens and doors communicating by top and bottom channels with thehollow shaft for keeping up the circulation of the air.

The invention consists, further, of certain details of construction andcombinations of parts, as will more fully appear hereinafter, andfinally be pointed out in the claims.

In the accompanying drawings, Figure l represents a vertical centralsection of my improved bolting-machine, Fig. 2, a horizontal section ofthe same on line x x, Fig. l; Fig. 3,

- a detail side view of the wire frame or cage of the bolting-reel; andFig. 4 a horizontal section of the bolting-reel, drawn on alarger scale.

Similar letters of reference indicate corresponding parts.

a inV the drawings representsa vertical tu,- bular shaft that isprovided with spider-frames c c at t-he ends, to the hubs ofl which areattached the end shafts, b b', that turn in step and neck bearings ofthe frame of the boltingmachine. The tubular shaft a is provided with anumber of holes or slots, u', and is preferably made of two parts thatare sepa rated at the center by a horizontal diaphragm orpartition-plate, w, to which the shaftfsections are riveted by suitableangle-irons, as shown in Fig. 1. The horizontal partition .r

serves to deflect the air that is drawn in through the spider-frames atthe upper and lower ends of the shaft a and force it through the holesof the shaft in a direction as nearly at right angles to thebolting-cloth as possible, so that the circulation of the air takesplace in two separate currents, an upper and a lower one, as indicatedby arrows in Fig. l. The tubular shaft a is provided with radial beatersff, which are connected by horizontal top and bottom shelves or disks, tt, for holding them A rigidly in position. Theupper shelf, t, servesalso as a distributing-plate for the meal supplied through theconveying-tube e. The outer edges of the beaters f are arranged withprojecting strips o, of suitable elastic material, that pass along theinner surface of the bolting-reel. The rotating beaters are inclosed bythe boltinglreel, which consists of a wire frame or cage around whichthe boltingcloth is loosely applied. The cage is formed of circular topand bottom frames, r r, vertical stays rr, and vertical parallel wiress. supported by the frames r r, as shown in Fig. 3. The bolting-reel,formed by the wire cage s and the'boltingcloth g, is again inclosed by aframe, p, the panels of which are provided with downwardly-inclinedsheet-metal deflectors n and screens d. The panels of the frame p aresupported by upright corner-posts, and are again inclosed by exteriordetachable doors p between which and the screens vertical chaunels Z areformed,which communicate at their lower ends by communicating-tubes owith a square bottom chamber, i', that surrounds the lower part of therevolving shaft a, and at the upper part with a chamber, 2,whichchambers communicate with the open ends of the tu'- bular center shaft.a. The flour that is passed through the bolting-cloth is conveyed oifthrough the channel h, while the coarser particles separated from themeal are passed through the channel i', to which they are moved by thescraper m, attached to the bottom shelf or disk, t.

The bolting-machine is operated in the following manner: The meal passesthrough the inlet-pipe e to the upper distributing shelf or disk, t, andfrom the same into the spaces between the rotating beaters f, whichthrow the meal by the action of centrifugal force against thebolting-cloth and conduct the same in a ICC spiral line along the sameuntil the finer particles are separated from the coarser ones andconducted off, respectively, through the channels h and i. The verticalbeaters f act inthe nature of a suction-fan by drawing in the airthrough the spider-frames at the ends of the tubular center shaft andforcing it through the openings of the shaft-sections in two separatecurrents through the bolting-cloth. As the ends of the tubular shaftcommunicate with the top and bottom chambers of the bolting-machine, andthe latter with the vertical channels' between the screens and exteriordoors the beaters draw the air that has been forced through thebolting-cloth, screens, and channels back into the shaft, so that acontinuous circulation of air is obtained and undue pressure in any partof the machine prevented, so that a very regular and effective screeningtakes place. Y

In baiting-machines heretofore in use the air is gradually compressed tosuch an extent that the air is emitted through every chink and untightpart of the frame to the outside, so as to carry screened particles ofiiour along and cause the so-called dusting77 of the machine. By myarrangementy dusting is entirely prevented, as an even pressure andcirculation of the air is kept up in the machine. Anotherimportantvpoint is, that the machine draws in but little fresh airthrough the supply-opening, so that consequently but little ymoisture ispassed into the machine, and thereby the sweating of the same prevented.The sheet-metal deiiectors prevent the choking of the screens, as theydistribute the fiour more uniformly over the screens. The most importantpoint of novelty, however, consists in the use of a bolting-reel with aloose boltingcloth, which is passed around a cage of wire rods, by whichthe contact of the beaters with the bolting-cloth is prevented. By theloose mounting of the bolting-cloth the latter is. continually kept inmotion by the aircurrent and thereby freed of the adhering iiourparticles.

l Ihe bolting-cloth can be applied to the supporting-frame in anysuitable manner, either in large sections, as shown in Fig. 2, or insmaller panels, so as to be of polygonal shape.

In either case the cloth is glued to the' top and bottom frames.

The interior of the machine is readily accessible by the removabledoors, so that any part of the reel can be readily repaired withoutdifficulty.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. rIhe combination of a perforated and tubularcenter shaft having radial beaters, a bolting-reel having a looseexterior boltingcloth, and inclosingframe having interior screens,exterior doors, and top and bottom chambers which communicate with thechannels between the screens and doors and with the tubular centershaft, substantially as set forth.

2. rIhe combination of a tubular and perforated center shaft having openends and a horizontal partition, radial beaters attached to the shaft,abolting-reel formed of a wire cage and a loose exterior bolting cloth,an inclosing-frame having exterior doors and interior screens, inclineddeflectors inside ofthe screens, and top and bottom chambers thatcommunicate with the vertical channels between the'screens and doors andwith the tubular center shaft, substantially as set forth.

3. In a centrifugal boltingmachine, the combination of a center shafthaving radial beaters with a bolting-reel formed of a wire cage andloose exterior bolting-cloth, substantially as set forth.

4. In a centrifugal bolting-machine, the combination of a tubular andperforated airdis tributing shaft having open ends and a horizontalpartition, radial beaters attached t0 said shaft, connecting shelves ordisks, and a bolting-reel formed of a wire cage and aloose exteriorbolting-cloth, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

EMIL STREITZ.

Witn esses:

C. SHWARZ, J GAIsToR.

